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8.6A Balanced/Unbalanced Forces & Net Force

Total questions: 67

Worksheet time: 2hrs 13mins

Name
Class
Date
1.
a)
Balanced
b)
Unbalanced
2.
a)
Balanced
b)
Unbalanced
3.
a)
Balanced
b)
Unbalanced
4.
a)
Balanced
b)
Unbalanced
5.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move up. 
6.
A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?
a)
Balanced Forces, Constant Speed
b)
Balanced Forces, Acceleration
c)
Unbalanced Forces, Constant Speed
d)
Unbalanced Forces, Acceleration
7.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
8.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
9.
Which could be an example of a balanced force?
a)
An asteroid moving at a constant speed through space 
b)
A car accelerating from a stop sign
c)
A box of dishes falling from a counter 
d)
A rocket taking off 
10.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
11.

These forces are...

a)

Balanced

b)

Unbalanced

12.

These forces are...

a)

Balanced

b)

Unbalanced

13.

These forces are...

a)

Balanced

b)

Unbalanced

14.

The net force is...

a)

50 N

b)

0 N

c)

100 N

d)

2500 N

15.
Balanced or unbalanced?
a)
balanced
b)
unbalanced
16.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
17.
If an object is not moving the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
18.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
19.

Which of the following objects will experience an unbalanced force?

a)

A bike rider on a smooth and level road, pedaling at a constant rate.

b)

A train pulling on another train, each with the same amount of force.

c)

A chair sitting on the floor with balanced forces acting in opposite directions.

d)

A ball rolling across the floor with friction acting in the opposite direction.

20.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
21.

A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

a)

Balanced Forces, Constant Speed

b)

Balanced Forces, Acceleration

c)

Unbalanced Forces, Constant Speed

d)

Unbalanced Forces, Acceleration

22.
If two forces act on an object in the same direction, the net force is the _____________
a)
the difference between the two forces
b)
the sum of the two forces
c)
Only one of the forces acts on the object
d)
DOOMSDAY!
23.

What is the net force?

a)

400 N Up at an increasing speed

b)

400 N Down at an increasing speed

c)

400 N Down at a constant speed

d)

800 N Down at a constant speed

24.
Why does a book on a table not move?
a)
No forces are acting on the book
b)
Gravity is the only force acting on the book
c)
Forces of the table pushing up and gravity pulling down are balanced
25.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
26.
(T or F?) A balanced force is only an object that is not moving. 
a)
True 
b)
False
27.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
28.
Why is person B having a hard time moving down the hill?
a)
Person B has more friction than person A.
b)
Person B has the same friction as person A.
c)
Person B is out of shape.
d)
Person B has less friction has person A.
29.

If the car in the diagram rolls faster and faster as it moves down the ramp, you can be sure that

a)

there is no friction acting on the object.

b)

the forces acting on it are unbalanced.

c)

the net force on the car is 0 N.

d)

only gravity is acting on the car.

30.

Based on the information in the diagram, what is the net force acting on this object?

a)

12 N downward at a constant speed

b)

4 N upward at an increasing speed

c)

4 N downward at an increasing speed

d)

8 N to the left at a constant speed

31.
Students are playing tug-of-war. If group B pulls the rope to the right with a force of 400 N and group A pulls the rope to the left with a force of 250 N, what will happen to the ribbon in the middle of the rope?
a)
The ribbon will move to the left and group A will win the tug-of-war.
b)
The ribbon will move to the left and group B will win the tug-of-war.
c)
The ribbon will move to the right and group B will win the tug-of-war.
d)
The ribbon will move to the right and group A will win the tug-of-war.
32.
A cyclist traveling at 25 km/hr turns sharply to the left while continuing to move 25 km/hr. This means the forces involved are_____________________.
a)
Balanced, because the cyclist's speed did not change.
b)
Balanced, because he was still moving forward.
c)
Unbalanced, because it's the same bicycle.
d)
Unbalanced, because his direction changed.
33.
The forces represented by the arrows in the diagrams are applied to the four objects that are at rest on a table. Which object is most likely to move to the right?
a)
Object W
b)
Object X
c)
Object Y
d)
Object Z
34.
The forces represented by the arrows in the diagrams are applied to the four objects that are at rest on a table. Which object is most likely to remain in place?
a)
Object W
b)
Object X
c)
Object Y
d)
Object Z
35.
If a force does not cause an object to move, it's considered a(n) __________________ force.
a)
Balanced
b)
Unbalanced
c)
Wimpy
d)
Weak
36.
An airplane is travelling North through the sky at a constant speed when turbulence causes it to take a different route, changing its direction. Explain the forces at work on this plane.
a)
Unbalanced, because the plane is moving forward, not backwards
b)
Unbalanced, because the speed is constant and there is a change in direction
c)
Balanced, because the plane is not falling to a lower altitude
d)
Unbalanced, because the plane is in motion
37.
An airplane is travelling at a constant speed of 540 mph.  Explain the forces at work on the plane.
a)
Unbalanced, because the plane is moving forward not backards
b)
Balanced, because the speed is constant and there is no change in direction
c)
Balanced, because the plane is not falling to a lower altitude
d)
Unbalanced, because the plane is in motion
38.
Imagine a bat swinging with a force of 1200 N, hitting a ball pitched with a force of 400 N. At what net force does the ball move away from the bat?
a)
1600 N
b)
800 N
c)
400 N
d)
Net force of 0 N
39.
The roller coaster car begins at point W.  At what point along the track will the car have the greatest amount of kinetic energy?
a)
W
b)
X
c)
Y
d)
Z
40.
What is the unit to MEASURE force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
41.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
42.

Calculate the Net Force.

a)

60N, Right

b)

60N, Left

c)

100N, Right

d)

100N, Left

43.
On which surface would friction be the greatest?
a)
carpet
b)
ice
c)
snow
d)
water
44.

A book rests on a table. The force of gravity pulls down on the book with a force of 20 newtons. What prevents the books from moving downward?

a)

The table presses back up on the book with an equal and opposite force of 20 newtons.

b)

The table presses back up on the book with a force greater than 20 newtons.

c)

The table and the book together are accelerating downwards at 9.8 m/sec2

d)

The inertia of the book holds it up

45.
Which one is balanced?
a)
top
b)
bottom
c)
both
46.
Is it BALANCED? 
a)
Yes
b)
No
47.
If there are two forces going in the SAME direction, you would ...?
a)
(-) Subtract the forces
b)
(+) Add the forces
c)
Neither
d)
(x) Multiply
48.
The FORCE that PULLS things down or back to EARTH.
a)
Speed
b)
Gravity
49.
If the net force is 0 the object will ... 
a)
CHANGES motion
b)
STAY the SAME, NOT Move
50.
What is the net force?
a)
65 N left
b)
65 N right
c)
35 N left
d)
35 N right
51.
What is the net force?
a)
4.2 N left
b)
4.2 N right
c)
2.2 N left
d)
2.2 N right
52.
What is the net force?
a)
5.5 N left
b)
5.5 N right
c)
2.5 N left
d)
2.5 N right
53.
What is the net force?
a)
11 N left
b)
11 N right
c)
3 N left
d)
3 N right
54.
What is the net force?
a)
3 N left
b)
3 N right
c)
7 N left
d)
7 N right
55.
The graph shows how the speed of an object changed over time. During which segments of this graph were the forces acting on the object balanced?
a)
R only
b)
Q and S
c)
R and T
d)
R, S and T
56.
The diagram below shows a skateboarder pushing himself forward with a force of 25 N while the wind pushes back with a force of 5 N. How will the skateboarder be affected if the force of the wind increases to 8 N?
a)
The speed of the skateboarder will increase.
b)
The speed of the skateboarder will remain constant.
c)
The speed of the skateboarder will decrease.
d)
The skateboarder will come to a stop.
57.
This list below includes six different scenarios. Which objects in the list experience an unbalanced force?
a)
The ball, the cat, and the flag
b)
The marble, the book and the toy car
c)
The cat, the book, and the flag
d)
The marble, the ball, the cat, and the toy car
58.

How do you find the net force of this image.

a)

Add up all the arrows

b)

Add a green arrow and the orange arrow.

c)

Subtract all the arrows.

d)

Add the green arrows and subtract the orange arrow.

59.

If a car has a force of 54 N forwards and the brakes have a force of 73 N backwards, what is the overall Net Force.

a)

16 backwards

b)

19 forwards

c)

18 backwords

d)

23 forwards

60.

If the wind is heading south with a force of 5 N, and a car is going north with force of 78936 N, what is the Net Force and Direction.

a)

78931 N North

b)

78931 N South

c)

78531 N North

d)

78531 N South

61.

What is the Net Force and which direction will the object move?

a)

641, Left

b)

571, Left

c)

70, Right

d)

480, Right

62.

Is the Net Force balanced or Unbalanced?

a)

Balanced

b)

Unbalanced

63.

If a boat traveling East has a Net Force of 324 N, and the wind blowing West has a Net Force of 789 N. What is the overall Net Force and which side?

a)

465 N, East

b)

465 N, West

c)

1113 N, West

d)

1113 N, East

64.

8 N to the left , and 4 N to the right. Find the net force. Is this balanced

a)

12 N Right No

b)

12 N Right Yes

c)

4 N Left Yes

d)

4 N Left No

65.

If a person is picking up a book with the force of 50 N and the gravity is pushing down with 15 N, what is the net force?

a)

50 N

b)

35 N

c)

65 N

d)

15 N

66.

With unbalanced forces, the object will move in the direction of the _______ force.

a)

equal

b)

smaller

c)

larger

67.

You and your friend, are playing tug of war. Your friend pulls with a force of 55 N, to the rights. You pull with a force of 65 N, to the left. What is the net force on the rope?

a)

20 N, to the left

b)

20 N, to the right

c)

10 N, to the right

d)

10 N, to the left

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